The documents say the two youngest children were locked in a room and deprived of any normal human contact.

"We were talking about situations where they had essentially been deprived of any normal contact that children would normally have," Carroll County State's Attorney Brian DeLeonardo said.

In November, officials from several agencies, including the Carroll County Sheriff's Office and the Department of Social Services, went to the home on Landau Drive and found deplorable conditions. Court documents reveal they found piles of trash, rotting food and dirty clothes.

Six children and their parents were living inside. Documents state the oldest four kids had flea bites and the youngest two -- a 5-year-old boy and a 7-year-old girl -- were found naked, locked in a bedroom.

The documents say, "There was no furniture, no toys, no clothing and feces were observed to be smeared on the floor, every wall, the doors and the windows."

The children were taken to a hospital for treatment. While there, court documents state, an evaluation showed the two youngest children didn't know their names or respond to basic instructions.

"They only knew how to drink using a bottle and when given food, they used their hands and ate off the floor. The female child was observed to move about and sit in an atypical manner and was described as animal like," the documents say.

Several neighbors said they didn't even know there were two young children living at the house because they never saw them. They said the older four children often wandered around the neighborhood hungry.

"The kids actually were very dirty. They had dirty clothes on. They looked like they hadn't bathed or their hair combed or anything," said Charlotte Guyton, a resident in the community. "They were telling me some really unusual things, like that they had a little brother, and sister and mommy kept them upstairs in the room with the door shut."

The parents -- Paul Trapani, 54, and Melissa Trapani, 44 -- were arrested and the children were placed in foster care. The Trapanis posted bail and are allowed supervised visits with their children despite prosecutors' arguments that they shouldn't get to see their kids at all.

WBAL-TV's Kim Dacey reports on the case out of Westminster. Watch below:

"Anytime you are dealing with cases that involve the abuse of children, under the circumstances that are described in the indictment, we are very concerned, and we will continue to work very hard and monitor the case," DeLeonardo said.

Together the Trapanis face 60 charges, including child abuse and child neglect.